I’ve been seeing some unusual latencies recently too; can you share some graphs and I’ll compare with mine! - A
On Sun, Oct 14, 2018, at 9:22 PM, Chris Malton wrote: > Hi all, > > I've been diagnosing a load of issues with a client service recently,> and > part of that's led to adding Smokeping for literally everything. > > Alas, that's turned up rather more than I had expected it to - some of> which > doesn't appear to be in my control or my DC's control or my > client's control either - and it's skewing some of the measurements! > > Of an evening, and at weekends (i.e. peak time internet usage) for at> least > the last week or so, I've been seeing very high latency on round> trips from > my rack in 4D in Gatwick to destinations in > JISC/JaNET. That> seems to be the only affected route for me, but is the > only one via TI> Sparkle that I've currently found. There's a little bit of > packet loss> in the mix as well (~0.1%), but nothing I'm immediately > concerned about.> > I've dug more into this over this weekend, and have identified that > AS6762 appears to be where the issues lie - specifically, the moment > traffic hits TI Sparkle's LINX router (2001:7f8:4::1a6a:1) I see an > 80-90ms latency increase at peak times. > > Is anyone else seeing high latency on routes via TI Sparkle > across Linx> and/or is there a friendly contact at TI Sparkle I can discuss > this > with? (Separately, I've asked 4D to peer directly with JISC on LINX -> but > that might take some time to get sorted) > > Thanks in advance. > > Regards, > > Chris Malton > >
